Abstract: A pedal drive for a bicycle having a driven wheel rotatably mounted to a frame, including a first sprocket rotatably mounted to the frame; a second sprocket rotatably mounted to the frame below the first sprocket and in planar alignment with it at a location spaced apart from the first sprocket; an endless chain extending about and interconnecting the first and second sprockets; a third sprocket rotatably mounted to the frame for rotary movement in response to the rotary movement of the first and second sprockets; an endless chain extending about and interconnecting the third sprocket and a sprocket attached to the driven wheel; left and right upper crank arms attached to the first sprocket and extending in generally opposite directions from each other; left and right lower crank arms attached to the second sprocket and extending in opposite directions from each other; a left pedal arm carrying a left pedal and pivotally connected to the left upper crank arm; a right pedal arm carrying a right pedal and pivot